An experimental device and method for cloud measurement based on terahertz active cloud measurement radar

Abstract

The invention provides cloud detection experimental device and method based on a terahertz active cloud-detection radar. The device comprises an emission box body, an emission antenna, a receiving box body, a receiving antenna, a system experimental platform structure, an inversion computer and a power supply system; the system experimental platform structure comprises a left mounting flat plate, a right mounting flat plate, a separating and locking mechanism, a 90-degre overturning mechanism for a mounted flat plate, an up-down moving mechanism for the mounted flat plate, two box body 90-degree rotating mechanisms and a control mechanism; the emission box body is used for generating a terahertz detection signal with the frequency of 220GHz and power of 100mW, and the emission antenna emits the detection signal; the receiving box body is used for acquiring an echo signal received by the receiving antenna and processing the received echo signal; the inversion computer is used for performing cloud parameter inversion for the signal processed by the receiving box body, so as to acquire cloud particle size and cloud and mist concentration information. With the adoption of the device and method, the cloud detection experiment under different polarizing modes can be achieved.

Description

technical field [0001] The invention relates to an experimental method for cloud measurement by active radar, in particular to an experimental device and method for cloud measurement based on terahertz active cloud measurement radar, and belongs to the technical field of radar measurement. Background technique [0002] The energy distribution and water cycle in the atmosphere are the main factors affecting global climate change, and clouds play a non-negligible role in the above process. Cloud radar is an effective means to obtain cloud characteristic parameters through active measurement technology. It transmits a signal in a fixed form, uses the detector to detect the echo signal, extracts the effective information, and finally inverts the required cloud information. Cloud radar usually includes a detection signal source, a transmitting antenna, a receiving antenna, a signal detection device and inversion software. [0003] Cloud radar mainly uses the scattering characte...

AI Technical Summary

Problems solved by technology

The second type uses the strong scattering effect of its laser, uses a relatively high-power detection signal source and a large-caliber antenna to measure the aerosol parameters in the atmosphere, such as the type, size, and density of aerosol molecules, for the study of cloud For microwave sources in the centimeter wave, decimeter wave, and millimeter wave bands, the scattering effect is very weak due to their long wavelengths, and the detection signal has a strong penetrability to clouds, resulting in The echo signal is very weak, which makes it easy to introduce relatively large errors in the measurement of this type of cloud radar, resulting in poor cloud information retrieval accuracy

[0006] (1) There is not yet a set of terahertz active cloud-measuring radar devices, including radar equipment and related cloud-measuring experiment auxiliary platform structures;

[0007] (2) There is not yet a clear set of cloud measurement experimental procedures and methods for terahertz active cloud radar

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