Multifunctional point-plane target heterodyne velocity measurement and calibration device

Abstract

The invention relates to the field of active laser detection, in particular to a multifunctional point-plane target heterodyne velocity measurement and calibration device. The device comprises a laser modulation light splitting system, a point target detection echo signal receiving system, a plane target laser heterodyne receiving system, a diffuse reflection target and velocity calibration system, a preamplifier and a wideband spectrum analyzer. The device can realize noncontact measurement of low, medium and high target velocities, can correct the velocity in real time, and has high measurement precision; and a target geometric shape can be inverted according to the target spectrum widening information, and type and main parameters of the detected target can be judged according to the multi-dimensional information of the target. In addition, the device can also be applied in the fields of glass thickness measurement, micro vibration detection, traffic condition monitoring and the like.

Description

technical field [0001] The invention relates to the field of laser active detection, in particular to a multifunctional point-plane target heterodyne speed measurement and calibration device. Background technique [0002] Laser heterodyne detection technology can be applied in the fields of ballistic missile defense, theater missile defense and national missile defense. The "Fire Pool" lidar originally developed by Lincoln Laboratory under the Massachusetts Institute of Technology was mainly used for NASA's earth-moon ranging mission, and later carried out laser satellite ranging and tracking tasks. Since 1998, the "Fire Pool" lidar has undertaken the target identification / blocking program of the US Department of Defense, using lidar based on heterodyne detection to identify incoming targets outside the atmosphere. [0003] Ballistic missiles break down into several parts during the exo-atmospheric stage, warhead, separate rocket booster, control box and other fragments. U...

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Problems solved by technology

[0005] In view of the above situation, in order to solve the defects of the prior art, the object of the present invention is to provide a multifunctional point-plane target heterodyne speed measurement and calibration device, which can effectively solve the problem that it is difficult to distinguish between true and false targets and cannot work continuously

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