DOPPLER VELOCITY SENSOR FOR MEASURING A MOVING SURFACE SPEED BASED ON INTERFEROMETER WITH A FIBER RADIATION INPUT

摘要

FIELD: measurement technology.;SUBSTANCE: invention relates to studying fast processes using the Doppler effect by laser heterodyne diagnostics and can be used for continuous recording of the speed of a moving object/objects. Measuring module of the claimed device includes 16 laser radiation sources for forming eight pairs of them and forming 64 measuring channels, in which the sources among themselves and in the pair differ from each other in frequency. Fiber circulators, being a part of passive optics, are separated from the remaining elements and placed in a separate unit, installed in close proximity to the object under study. Remaining elements of passive optics are housed in another separate unit, which includes 16 multiplexers providing the compaction of signals from the circulators, wherein the inputs of the multiplexers are connected to the outputs of the fiber circulators, and the outputs of the multiplexers – to the amplifiers of reflected radiation, half of which is connected to the adders and channels of the oscilloscopes through the fiber delay lines, and another half is directly connected to the adders and channels, and the laser radiation sources are connected to the adders via high-speed fiber switches.;EFFECT: increasing measurement informativity.;1 cl, 2 dwg, 1 tbl