Experimental and Theoretical Problems of Signal Processing at Vibro-Displacement Measurement by Autodyne Sensors

Theoretical analysis is fulfilled for the algorithms and software formation for measuring signal processing and calculation of vibro-displacement parameters during the measurements using Doppler displacement measuring systems on the basis of the autodyne UHF sensors on centimeter range. The peculiarities of the registered signals are shown depending on the operating point of autodyne. The experimental results are discussed. Fulfilled UHF measurements at the container transportation confirmed the validity of the technical solution and confirmed the mathematical model and calculation approach adequacy. Checking circuit on two UHF measuring systems with fixed phase difference allows eliminating the calculation uncertainty and determination of current vibro-displacement direction. The determination error and minimal calculated displacement threshold are determined by the initial system calibration as well as by the measuring channel noise-immunity.