Non-blind area high-range resolution laser radar wind measurement system and method

Abstract

The invention provides a non-blind area high-range resolution laser radar wind measurement system. A laser is connected to an electro-optical phase modulator and an acousto-optic frequency shifter through a first coupler; the electro-optic phase modulator, the fiber amplifier, the circulator and the telescope are sequentially connected. The telescope is connected to a second coupler through a circulator; the acousto-optic frequency shifter, the second coupler, a balance detector, an amplifier, a dual-channel AD collection card and a computer are sequentially connected; a sinusoidal signal generator is connected to the acousto-optic frequency shifter; an arbitrary waveform generator is connected to the dual-channel AD collection card and an electro-optical phase modulator; and an external trigger is connected to the arbitrary waveform generator and a dual-channel AD collection card. The invention also provides a non-blind area high-range resolution laser radar wind measurement method. Through combination of the pseudo-random code phase modulation technology and the heterodyne detection technology, the system works under the wide pulse width and the low peak power to obtain the profile wind speed information at the non-blind area with a high-range resolution through adoption of the algorithm of removing an end face signal influence.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a wind-measuring laser radar system and method with no blind zone and high distance resolution. Background technique [0002] Laser wind radar is a new type of atmospheric remote sensing equipment and the only effective tool that can realize three-dimensional atmospheric wind field remote sensing observation. Its working principle is to use laser transceiver system to collect particle scattering echo information in the air, and then analyze and calculate these The measurement data can directly obtain high-resolution and high-precision real-time three-dimensional wind field data. [0003] Due to the large reflection signal of the end surface, the current laser wind radar has drowned the wind speed information in the near field, so there is a wind speed measurement blind spot. In addition, in order to obtain better distance resolution, the pulse width of the current laser wind...

AI Technical Summary

Problems solved by technology

[0003] Due to the excessive reflection signal of the end surface of the current laser wind radar, the near-field wind speed information is drowned out, so there is a wind speed measurement blind spot

In addition, in order to obtain better distance resolution, the pulse width of the current laser wind measurement system is relatively short, so a higher peak power is required

This puts forward higher requirements for system implementation, greatly increases the power consumption of the system, and increases the cost of the system

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