Method for measuring laser rainfall weather phenomenon and laser rainfall weather phenomenon instrument

Abstract

The invention relates to a method for measuring a laser rainfall weather phenomenon and a laser rainfall weather phenomenon instrument. A calcite crystal with the birefringent characteristic is arranged at a light source transmitting end, so that two accurate parallel horizontal measurement light strips generated by the light source transmitting end take stopping and attenuating effects on light when falling rainfall particles pass through the measurement light strips; a double peak-shaped measurement signal is generated on a receiving end photoelectric detector; and by measuring a peak-peak interval and an integral value of the double peak signal, the falling speed of the rainfall particles and information of the particle size can be obtained, the judgment on the rainfall weather phenomenon is implemented and data such as a rainfall strength, a rain droplet size spectrum and the like can be provided.

Description

technical field [0001] The invention relates to a measurement method and a measurement device of a laser precipitation weather phenomenon, belonging to the technical field of meteorological detection. Background technique [0002] Precipitation weather phenomenon is a routine item in meteorological observation, and the observation of this item is of great significance to the research of various disciplines. Accurate identification of precipitation types provides an important basis for scientific research on meteorology, hydrology, agriculture, and resources and the environment, and has great practical value in the fields of agricultural production, transportation, and disaster prevention and mitigation. [0003] According to the definition of precipitation weather phenomena by the International Meteorological Organization, precipitation is liquid or solid water vapor condensate that falls from the cloud or from the atmosphere to the ground, including: rainfall (drizzle, ligh...

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Problems solved by technology

like image 3 As shown, at positions 1 and 2, precipitation particles with the same particle size and velocity will have different measurement results, namely figure 2 The width and height of the measured pulse signal are different, and different particle size and velocity data are obtained after calculation; (2) Theoretically, the shape of the raindrop is circular, but in practice there is deformation, especially for larger Precipitation particles of size

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