LIDAR MEASURING DEVICE Russian patent published in 2021 - IPC G01S17/32 G01S17/58 G01S17/95 

FIELD: measuring technology.

SUBSTANCE: invention relates to measuring technology and lidar measuring device for determining the velocity of particles in a measuring volume. The lidar device contains a laser light source that emits light, which is injected into the measurement and reference branches. The light introduced into the measuring branch is emitted towards the measuring volume. The receiver receives the scattered and / or reflected light, on which the light emerging from the reference branch is coherently superimposed, and the resulting radiation is directed to the detector. In the analytical evaluation block, taking into account the detector signal, the velocity of particles in the measuring volume is determined. With the help of the control device, the frequency of the emitted light is varied, and the speed of the particles is determined based on the spectral analysis of the detector signal, taking into account the given frequency modulation. The control device is configured to create a control signal that corresponds to a pseudo noise signal caused by a given frequency function and which is the basis for varying the frequency of the light emitted by the laser light source.

EFFECT: technical result consists in simplifying the device and making it possible to measure both the speed and the direction of movement of particles in the measurement volumes located at different distances from the device.

15 cl, 4 dwg