A multi-wavelength ozone lidar based on single-photon ccd

A laser radar and single-photon technology, applied in ICT adaptation, electromagnetic wave re-radiation, radio wave measurement system, etc., can solve the problems of laser radar measurement result system deviation, complex device, difference in detector response ability, etc., to achieve maximum increase The effect of measuring height, simplifying composition, and eliminating mutual interference

Active Publication Date: 2021-12-21
山东国耀量子雷达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this combination of detectors not only further complicates the device, but also brings systematic bias to the lidar measurement results due to the difference in the response capabilities of each detector.

Method used

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  • A multi-wavelength ozone lidar based on single-photon ccd
  • A multi-wavelength ozone lidar based on single-photon ccd
  • A multi-wavelength ozone lidar based on single-photon ccd

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Experimental program
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Embodiment

[0037] figure 1 A schematic structural diagram of a single-photon CCD-based multi-wavelength ozone laser radar provided for an embodiment of the present invention, including: a laser light source 1, a Raman tube 3, an optical transmitting module, an optical receiving module 7, a spectrometer 9, and a single-photon CCD10 , photon counter 11, main control module 12;

[0038] The laser light source 1 is used to output laser light, and the laser light includes laser light with a first wavelength; the first wavelength is located in an absorption band of ozone.

[0039] It should be noted that ozone has multiple absorption bands, and it can absorb ultraviolet light of 200-320nm. Currently, the commonly used method for measuring ozone uses a light source with a wavelength of 266nm. However, the present invention is not limited to laser light sources with a wavelength of 266nm. Other wavelengths, such as 290nm and 300nm are applicable to the present invention as long as they can meas...

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Abstract

The invention discloses a multi-wavelength ozone laser radar based on a single-photon CCD, comprising: a Nd-YAG quadruple frequency laser, an optical lens, a Raman tube, a beam expander, a plane mirror, an optical receiving module, a spectrometer, a detection module, Data acquisition and synchronization control unit. The present invention is based on a single Raman tube stimulated Raman to generate multi-wavelength lasers. By using the echo signals of different wavelength pairs for differential inversion, the ozone concentration can be measured with high precision within a large vertical height range. The use of the Mann tube not only simplifies the device, but also reduces the difference in geometrical factors of different wavelength lasers and improves the measurement accuracy of the device. In addition, the use of single-photon CCD not only simplifies the composition of the detection part, reduces the measurement error caused by the difference of the detector, makes the lidar device have a large upgrade space, but also benefits from the high sensitivity of single-photon detection , increasing the maximum measurement height of the device.

Description

technical field [0001] The invention relates to the field of ozone differential absorption laser radar devices, in particular to a multi-wavelength ozone laser radar based on a single-photon CCD. Background technique [0002] Ozone is a key component of the atmosphere. About 90% of ozone exists in the stratosphere 10km to 50km from the surface. This part of ozone can absorb ultraviolet rays in sunlight, thereby protecting organisms on the earth from direct exposure to ultraviolet rays; the rest 10% of ozone exists in the troposphere closer to the surface. This part of ozone participates in photochemical reactions in the atmosphere and plays an important role in air pollution in the troposphere. In addition, excessive ozone levels can irritate and damage the eyes, respiratory system, etc. Mucous membrane tissue, which has a negative effect on human health. Therefore, it is of great significance to measure the temporal and spatial distribution of ozone. At present, remote sen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/95G01S7/481
CPCG01S7/481G01S7/4818G01S17/95Y02A90/10
Inventor 陶雷刚夏海云
Owner 山东国耀量子雷达科技有限公司
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