INTERFEROMETRIC SENSOR Russian patent published in 2019 - IPC G01D5/353 

FIELD: measurement; testing.

SUBSTANCE: disclosed group of inventions relates to interference sensors, as well as to methods of measurement using these sensors. Said sensor comprises a sensing element, by means of which a measured value induces a relative phase shift between two waves, at least one detector measuring the interference signal between two waves, and additionally includes a phase shift detection unit having, as an input signal, an interference signal and determining a first measure, which is the principal value (ϕ, 13) of the relative phase shift, and a contrast detection unit having, as an input signal, an interference signal, for determining a second measure (A, 12), which is a cross-correlation between two waves, and a processing unit for converting the first and second measures to value (x) of the measured value. Corresponding measurement method is implemented using the described sensor.

EFFECT: present group of inventions is aimed at eliminating the periodic ambiguity of measurements.

21 cl, 9 dwg