Hybrid detection Doppler lidar wind speed measurement system and its measurement method

Abstract

A mixed detection Doppler laser radar wind speed measurement system and its measurement method, the laser radar device includes a dual-wavelength laser with a first wavelength and a second wavelength, a first wavelength pointing control module, a first wavelength emission beam expander telescope module, The second wavelength beam expander, optical transceiver switch, spectrum splitting module, transceiver telescope, relay optical module, optical filter, first wavelength polarization beam splitter, FP frequency discriminator, first direct detection optical unit, second direct The detection optical unit, the first direct detection receiving detector, the second direct detection receiving detector, the second wavelength receiving pointing control module, the coherent detection optical unit, the coherent detection receiving detector and the host computer data processor. The invention satisfies the special parameter requirements of coherent detection and direct detection light source, greatly reduces the complexity of the system, and greatly improves the simplicity of the light source used in the hybrid detection technology. The device is suitable for ground-based, airborne and space-borne platforms, and can realize high-precision, high-resolution atmospheric wind field measurement, and can meet all-weather real-time large-scale measurement.

Description

technical field [0001] The invention belongs to the field of laser radar, in particular to a mixed detection Doppler laser radar wind speed measurement system and a measurement method thereof. The radar system is equipped with lasers in two bands of the first wavelength and the second wavelength. At the same time, the mixed detection technology of coherent detection technology and direct detection technology is used to detect the wind field, which improves the detection ability of the atmospheric wind field and provides a basis for meteorological research. , environmental monitoring and aviation applications. Background technique [0002] Atmospheric wind field is a very important item in atmospheric parameters, and it plays an important role in climate meteorology research, numerical weather prediction, environmental monitoring, and military aviation applications. Especially in windshear detection, it is of great significance to improve flight safety altitude. Doppler win...

AI Technical Summary

Problems solved by technology

The two measurement methods have their own advantages and disadvantages, but the two methods are used in the same lidar wind measurement system, which includes the advantages of coherent and direct detection at the same time, and a lidar wind measurement system that shares the same laser has not yet appeared.

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