Pulse laser coherent wind measuring radar

A technology of pulsed laser and coherent wind measurement, which is applied in the direction of measurement devices, radio wave measurement systems, electromagnetic wave re-radiation, etc., can solve the problems of affecting measurement accuracy, signal misjudgment, and difficult processing, etc., to increase measurement accuracy and system Reliable and stable, improve the effect of signal-to-noise ratio
CN103823221AInactive Publication Date: 2014-05-28SOUTH WEST INST OF TECHN PHYSICS
4 Cites 38 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH WEST INST OF TECHN PHYSICS
Publication Date
2014-05-28
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention brings forward a pulse laser coherent wind measuring radar, for the purpose of providing a pulse laser coherent wind measuring radar which has the advantages of high measuring precision, simple structure and convenient installation and debugging. The pulse laser coherent wind measuring radar is realized through the following technical scheme: a fiber pulse laser emission system is taken as an emission source for generating two beams of laser, one beam of high repetition frequency pulse sequence laser for wind field detection is directly coupled through an optical circulator and enters an optical transmit-receive scanning system to perform collimated emission towards a target spatial domain, the optical circulator utilizes a polarization splitting characteristic to carry out isolation splitting on emission light and air aerosol scattering echo wave light, the air aerosol scattering echo wave light is selected to enter a fiber combiner, the other beam of laser, generated by the fiber pulse laser emission system, is taken as local oscillator light for inputting into a balance amplification photoelectric detector together with the echo wave light in a frequency mixing mode for optical amplification of a frequency mixing signal, through acquisition processing of a signal acquisition processor, the radial speed of each range gate in a current laser emission direction is calculated, and the radial speeds are transmitted to a radar operation display interface.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a pulse laser coherent wind measuring radar used for measuring wind speed and direction of medium and long-distance atmospheric wind fields. More specifically, the present invention relates to an integrated, modular mid-range and long-range wind-measuring lidar that utilizes the laser Doppler effect and the principle of coherent detection, adopts all-fiber connection transmission, and combines the transmitting and receiving antennas into one. Background technique

[0002] The radar system used to measure the wind speed and direction of the atmospheric wind field in the prior art measures the atmospheric wind field by using the Doppler frequency shift effect of the scattered echoes of laser light by tiny particles drifting with the wind in the atmosphere. Generally, a coherent detection method with the characteristics of no need for direct contact, high measurement accuracy, and long operating distance is also used. For example...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More