Overlap factor calibration device and calibration method for a ground-based aerosol lidar system

An overlap factor, lidar technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as aerosol observation limitations, achieve good scalability and versatility, ensure accuracy, and simple device structure.
CN110488252BActive Publication Date: 2021-11-09ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2021-11-09

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Abstract

The invention discloses an overlapping factor calibration device and a calibration method of a ground-based aerosol lidar system, including a laser emitting system, a receiving system, and an acquisition and processing system; the receiving system includes a main telescope and an auxiliary telescope, and the main telescope receives The signal is divided into two paths after passing through the first aperture diaphragm, the first collimating eyepiece and the first polarization cube beamsplitter prism, and the signal reflected by the first polarization cube beamsplitter prism enters the first photomultiplier tube channel; The signal received by the auxiliary telescope enters the fourth photomultiplier tube channel after passing through the second aperture diaphragm, the linear polarizer and the second collimating eyepiece; the acquisition system includes a data acquisition card and an industrial computer, and the data acquisition card acquires The signals of each photomultiplier tube channel are sent to the industrial computer for processing. The invention can solve the limitation problem of aerosol observation near the ground in the atmospheric boundary layer of the ground-based aerosol lidar.
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Description

technical field

[0001] The invention belongs to the technical field of atmospheric aerosol remote sensing laser radar, and in particular relates to an overlapping factor calibration device and a calibration method of a ground-based aerosol laser radar system. Background technique

[0002] Ground-based aerosol lidar is of great significance for the study of aerosol distribution in the atmospheric boundary layer (the ground extends to 1-1.5 km from the surface, the atmosphere with turbulent characteristics), but because the lidar system is limited by the overlap factor (described Influenced by the overlapping area between the receiving field of view of the telescope and the change with height), the detection distance close to the ground is limited and the detection results depend on the accuracy of the calibration of the overlap factor. Therefore, lidar-based studies on the dynamics of the atmospheric boundary layer or air pollution often cannot be performed accurately. To ac...

Claims

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