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Frequency comb lidar detection method and system for simultaneously measuring multiple components of the atmosphere

A technology of laser radar and detection method, applied in the field of radar detection, can solve the problems of high cost, inability to measure various atmospheric components at the same time, complex system, etc., and achieve the effects of high precision, high resolution and large measurement range

Active Publication Date: 2020-08-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional lidar technology can only use a single frequency or several frequencies to detect atmospheric components, and cannot measure multiple atmospheric components at the same time
If you need to measure multiple atmospheric components at the same time, you need to use multiple lasers; not only the system is complex, but also the cost is very expensive

Method used

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  • Frequency comb lidar detection method and system for simultaneously measuring multiple components of the atmosphere
  • Frequency comb lidar detection method and system for simultaneously measuring multiple components of the atmosphere
  • Frequency comb lidar detection method and system for simultaneously measuring multiple components of the atmosphere

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Embodiment 1

[0054] Such as Figure 1-Figure 2 As shown, the frequency comb lidar detection method for simultaneously measuring multiple components of the atmosphere includes the following steps:

[0055] S1, the frequency of the seed laser 11 is ω c After passing through the corresponding frequency comb laser 12, the seed light emits ωc, ωc+ωm, ωc-ωm, ωc+2ωm, ωc-2ωm...ωc+nωm, ωc-nωm multiple spectral frequencies, and then emits through the mirror 13 Into the atmosphere

[0056] S2. The telescope 21 is used to collect the echo signals generated after the laser interacts with the atmosphere, and the echo signals pass through the corresponding beam splitter 32 to separate signals of different frequencies;

[0057] S3. The signals of different frequencies separated by the different beam splitters 32 are transmitted to the corresponding detectors 34 after passing through the corresponding filters 33, and simultaneously detect the echo signals of various frequency components reacted with the atmosphe...

Embodiment 2

[0089] Such as figure 1 As shown, the system using the frequency comb lidar detection method for simultaneous measurement of multiple components of the atmosphere in Embodiment 1 includes a transmitting module 1, a receiving module 2, a detection module 3, and a collection and processing module 4 arranged in sequence. The transmitting module 1 It includes a seed laser 11, a frequency comb laser 12, and a mirror 13 arranged in sequence; the receiving module 2 includes a telescope 21; the detection module 3 includes an eyepiece 31, a plurality of beam splitters 32, and a plurality of A filter 33 and a plurality of detectors 34, the beams of each beam splitter 32 are transmitted to the detector 34 after passing through the corresponding filter 33 in turn; the acquisition and processing module 4 includes a data acquisition unit 41 and a signal processing unit The multiple input ends of the data acquisition unit 41 are respectively connected to the corresponding detectors 34, and th...

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Abstract

The invention relates to a frequency comb laser radar detection method for simultaneously measuring various components of atmosphere and a system. The method includes the following steps that: S1, a seed laser emits seed light, after the seed light passes through a corresponding frequency comb laser, a plurality of spectral frequencies are outputted, and then emitted into the atmosphere through areflector; S2, a telescope is adopted to collect echo signals generated by the interaction of the laser and the atmosphere, the echo signals sequentially pass a corresponding beam splitter, so that signals of different frequencies can be divided through the beam splitter; S3, the signals of different frequencies pass through a corresponding filter and thereafter are emitted into a corresponding detector; and S4, the detector converts detected optical signals into electrical signals, and then the electrical signals are acquired through a data acquisition unit, and the acquired data are stored in a data processing unit. According to the method and system of the invention adopted, the frequency comb laser is introduced, and an inversion algorithm for simultaneously measuring various atmospheric components is developed based on a traditional differential absorption laser radar inversion technique, and therefore, the method and system have great theoretical and practical value.

Description

Technical field [0001] The invention relates to the field of radar detection, in particular to a frequency comb lidar detection method and system for simultaneously measuring multiple components of the atmosphere. Background technique [0002] Traditional lidar technology can only use a single frequency or several frequencies to detect atmospheric components, and cannot measure multiple atmospheric components at the same time. If you need to measure multiple atmospheric components at the same time, you must use multiple lasers; not only the system is complicated, but the cost is very expensive. Therefore, a new detection method and system is urgently needed to solve the above problems. Summary of the invention [0003] In order to overcome the above shortcomings of the prior art, the present invention provides a frequency comb lidar detection method and system for simultaneously measuring multiple components of the atmosphere. [0004] In order to achieve the above objectives, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/48G01S7/481G01S17/95
CPCG01S7/4802G01S7/481G01S17/95Y02A90/10
Inventor 刘东储玉飞王英俭邓迁邢昆明吴德成王珍珠王邦新钟志庆范爱媛谢晨波
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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