Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Rayleigh-Doppler wind lidar based on wide-spectrum gated coherent detection

A Doppler wind measurement and lidar technology, which is applied in the field of Rayleigh Doppler wind measurement lidar, can solve the problems of limiting the application of Doppler wind measurement lidar, remove signal detection errors, improve sensitivity, and prevent saturation Effect

Active Publication Date: 2019-07-26
江苏光在科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the above shortcomings limit the application of coherent Doppler wind lidar in the field of molecular Rayleigh scattering signal detection

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rayleigh-Doppler wind lidar based on wide-spectrum gated coherent detection
  • Rayleigh-Doppler wind lidar based on wide-spectrum gated coherent detection
  • Rayleigh-Doppler wind lidar based on wide-spectrum gated coherent detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] figure 2 It is a structural block diagram of the Rayleigh Doppler wind lidar based on wide-spectrum gating coherent detection provided by the present invention, such as figure 2 As shown, it includes: continuous wave laser 1, fiber beam splitter 2, optical modulator 3, laser amplifier 4, fiber optic circulator 5, telescope 6, mixer 7, photodetector 8, bandpass filter 9, front A preamplifier 10, a power divider 11, an adjustable bandpass filter 12, a multi-channel acquisition card 13 and a digital signal processing module 14.

[0042] The continuous wave laser 1 is used to output continuous light as seed light. In an optional embodiment, the continuous wave laser is a fiber laser, and the fiber laser has the advantages of small size and light weight.

[0043] The output end of the continuous wave laser 1 is connected to the optical entrance of the optical fiber splitter 2, and the optical fiber splitter 2 divides the input optical signal into signal light and local o...

Embodiment 2

[0085] like Figure 5 As shown, the present invention also provides a Rayleigh Doppler wind lidar based on wide-spectrum gating coherent detection, including: a continuous wave laser 1, a beam splitter, an optical modulator 3, a laser amplifier 4, a circulator, Telescope 6, mixer 7, photodetector 8, bandpass filter 9, preamplifier 10, power divider 11, adjustable bandpass filter 12, multi-channel acquisition card 13 and digital signal processing module 14; Wherein ,

[0086] The optical signal output by the continuous wave laser 1 is divided into signal light and local oscillator light after being passed through the beam splitter. After the signal light is input to the optical modulator 3 for modulation, it is input to the laser amplifier 4, and the laser amplifier 4 amplifies the input optical signal and outputs it to the The input end of the circulator, the transceiver end of the circulator is connected to the telescope 6, and the optical signal output from the output end o...

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

PUM

No PUM Login to View More

Abstract

The present invention discloses a Rayleigh Doppler anemometry laser radar based on wide spectrum gated coherent detection. A band pass filter is used to filter an aerosol mie scattering signal in echo signal current, and a preamplifier is used to amplify a molecular Rayleigh scattering signal. An adjustable band pass filter is used to carry out scan filtering on the amplified Rayleigh signal in a range, and an electric scanning frequency discriminator structure is realized. According to the Rayleigh Doppler anemometry laser radar, the advantages of an amplification effect of a weak signal and a high detection complexity are used in the coherent detection, and the advantage of a small data processing calculation quantity in using a frequency discriminator to discriminate an echo signal in direction detection is used. A problem that a traditional coherent anemometry laser radar can not detect a molecular wide spectrum Rayleigh signal is solved, and the application of a coherent Doppler anemometry laser radar in temperature measurement and high altitude sounding is realized.

Description

technical field [0001] The present invention relates to the technical field of laser radar, in particular to a Rayleigh Doppler wind-measuring laser radar based on wide-spectrum gating coherent detection. Background technique [0002] The active observation of the global wind field is called one of the most meaningful and challenging meteorological observations by the World Meteorological Organization. In the detection of atmospheric wind field, the commonly used means are weather balloons, sonar detectors, microwave wind radar, wind lidar and so on. As a popular active atmospheric remote sensing method, lidar has the advantages of small size, high measurement accuracy, and high time and space resolution. It is very suitable for actual combat applications that require fast measurement speed, high mobility, and good concealment. Wind lidar is divided into direct detection wind lidar and coherent detection wind lidar. The direct detection wind measurement lidar uses an optic...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 张仁俊赵自豪
Owner 江苏光在科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com