MICROWAVE INTERFEROMETER Russian patent published in 2019 - IPC G01S13/36 

FIELD: measurement technology.

SUBSTANCE: invention relates to means of measuring movement using radio waves using a phase method. Microwave interferometer comprises two receiving-transmitting units, identical in structure, operating at different frequencies of probing radiation and each consisting of continuous harmonic oscillation generator connected to input of transmitting antenna operating on definite polarization, receiving antenna operating on orthogonal polarization and connected by its output to mixer input, heterodyne of which is a generator in the same receiving-transmitting unit and connected by its output to the input of an intermediate frequency amplifier, equal to the difference of frequencies of probing radiation of generators of continuous harmonic oscillations in said units, as well as a phase detector connected by its inputs to outputs of intermediate frequency amplifiers in said units and its output through an analogue-to-digital converter with the input of the microcontroller to form a discrete time dependence of movement of the reflecting surface of the monitored object. At that, both receiving-transmitting units are located on the same base fixed relative to each other, all antennae in the device are directed to the reflecting surface of the monitored object, and working polarization of transmitting antenna of one receiving-transmitting unit and receiving antenna of other receiving-transmitting unit are matched in pairs. Generators of continuous harmonic oscillations in the receiving-transmitting units can operate in SHF or EHF radiation range with frequency difference within HF or VHF range. Functions of analog-to-digital conversion, phase detection, generation and transmission of discrete time dependence of measured movement can be implemented in microcontroller. Microcontroller can be connected through a local network to the central processor of the monitoring system of controlled object movements.

EFFECT: high accuracy of measuring movement of a reflecting surface of a monitored object using a microwave interferometer based on unified receiving-transmitting units, due to elimination of interfering signals emitted by transmitters in each receiving-transmitting unit, reflected from moving object and received by receivers in the same receiving-transmitting unit.

4 cl, 1 dwg