Incoherent laser windfinding method and laser radar

Abstract

This invention is an unconcerned laser anemometric method and the laser radar to realize mentioned method. Firstly it produces the pulse laser with narrow line width, and locks the pulse laser frequency to form the laser radar emitting unit, then makes the laser pulse sequence emit into the atmosphere. Using the telescope to receive the atmosphere molecules and the aerosol backward dispersion lights, the received light signals are divided into two ways. The light signals in one way are directly transformed into electric signals I, and the light signals through the iodine absorbing filter in the other way are transformed into electric signals II. We can obtain the radial wind speed by the data processing of the two way computer collected electric signals. The key point of data processing is to obtain the response curve of the laser radar wind speed. By tuning the seminal laser frequency, scan the laser frequency of the frequency chart width covered by the absorbing line around 532 nm in the iodine absorbed filter. The changing of the rate of the laser echo signals in the two way (I / II) which is received in the covered frequency chart width with the changing of the laser frequency is just the measured real-time wind speed response curve. Emendate the radial wind speed according to the wind speed response curve, then obtained the aclinic wind speed section plane orderly through the triangle geometrical relation of the radial wind speed in two directions and the aclinic wind speed.

Description

technical field [0001] The invention relates to an incoherent laser wind measurement method and a laser radar for realizing the method. Background technique: [0002] Wind speed measurement plays an important role in many aspects of meteorology, environment, transportation and other undertakings. At present, the coherent measurement method can only obtain the wind speed in the range of about 0-3 kilometers, while the non-coherent method using the iodine absorption filter can obtain the wind speed in the range of 40-60 kilometers. However, because the air in the low altitude (0-10 km) or troposphere contains a large number of aerosol particles, and its content cannot be determined, the wind speed measurement technology for this airspace has always been a blank. Contents of the invention [0003] Invent an incoherent laser wind measurement method that can use the incoherent Doppler effect to measure the atmospheric horizontal wind speed at a height of 0-10 kilometers or in ...

AI Technical Summary

Problems solved by technology

The measured radial direction can be corrected by using this response curve, and then the atmospheric wind field can be obtained by analyzing and processing the radial wind speed, which overcomes the simultaneous existence of atmospheric aerosols and atmospheric molecules in the altitude range of 0-10 kilometers (or troposphere) in the low atmosphere. , unable to measure wind speed

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