Atmospheric ozone profile Raman-Rayleigh/Lamy laser radar measuring device and detection method
A technology of laser radar and detection method, which is applied to measurement devices, radio wave measurement systems, Raman scattering, etc., can solve problems such as uneconomical, inaccurate measurement results, and short dye life, and achieves improved accuracy and simple test conditions. , the effect of increasing the measuring range
Inactive Publication Date: 2014-04-02
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology
[0004] (1) The condition of the laser light source required by the method is very harsh, and the dye life is very short, which causes the energy of the laser light source to be unstable and uneconomical;
[0005] (2) During the experiment, the dye needs to be constantly replaced, and the continuity of the experiment cannot be well guaranteed;
[0006] (3) Due to the instability of laser energy, the measurement results are inaccurate
[0007] (4) Due to the existence of the dynamic range of the detector, the effective measurement height range is limited
Method used
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[0052] Such as figure 1As shown, the second harmonic laser output of the Nd:YAG laser is expanded by the beam expander, and then reflected by the mirror, then enters the atmosphere vertically, the backscattered light is accepted by the telescope, and the scattered light is focused at the focal point of the telescope and then Coupled to three detectors through the optical path: one is the Raman scattering channel; the other is the Rayleigh channel, which uses gating technology to start measurement at a certain height to ensure that the photon counter is not damaged due to energy oversaturation; The third is the meter channel. In the lidar equations of Rayleigh-Mee scattering and Raman scattering, the extinction caused by the absorption of ozone is considered at the same time, and the data measured by the Rayleigh-Mee and Raman channels are combined by the Rayleigh-Mee and Raman scattering equations Based on the obtained Bernoulli differential equation, the profile of atmospher...
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The invention discloses an atmospheric ozone profile Raman-Rayleigh / Lamy laser radar measuring device and a detection method. The device comprises an optical path, a data acquisition unit and a main control computer, wherein the front part of the optical path comprises a laser emitter, a beam expander, a reflecting mirror, a receiving telescope and a collimating mirror in sequence; and the back part of the optical path is provided with a dichroic mirror and a semi-reflective and semi-permeable lens for receiving respectively; split light of the dichroic mirror is transmitted into a photoelectric detector A; reflected split light of the semi-reflective and semi-permeable lens is transmitted to a photoelectric detector B; transmitted split light of the semi-reflective and semi-permeable lens is transmitted to a photoelectric detector C; the photoelectric detectors A and B are connected with the main control computer through the data acquisition unit; the photoelectric detector C is connected with the main control computer through an A / D (Analog to Digital) data acquisition unit; the photoelectric detectors A and B are provided with control units respectively; and the control units are connected with the main control computer respectively.
Description
Technical field: [0001] The invention relates to a Raman-Rayleigh / meter laser radar high-precision measuring device and detection method for atmospheric ozone profile, belonging to the field of laser atmospheric detection. Background technique: [0002] The conventional and traditional measurement methods of atmospheric ozone profile are radiosonde technology and laser radar measurement technology, and laser radar measurement is more convenient and accurate than radiosonde measurement. The measurement method is differential absorption lidar measurement. [0003] Disadvantages: [0004] (1) The condition of the laser light source required by the method is very harsh, and the dye life is very short, which causes the energy of the laser light source to be unstable and uneconomical; [0005] (2) During the experiment, the dye needs to be constantly replaced, and the continuity of the experiment cannot be well guaranteed; [0006] (3) Due to the instability of laser energy, th...
Claims
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Login to View More IPC IPC(8): G01N21/00G01N21/65G01S17/88
Inventor 曹念文周昭明施建中杨丰恺
Owner NANJING UNIV OF INFORMATION SCI & TECH