Calibration device and method for a scattering cloud droplet particle detector

Abstract

The invention provides a calibrating device for a scattered cloud drop particle detector, which belongs to the technical field of meteorological analysis, and includes a three-dimensional translation platform, a glass bottle for placing standard particles, a constant airflow pump and an optical fiber core; the table top of the three-dimensional translation platform is fixed to the glass bottle Connection, the bottle mouth of the glass bottle is connected to the glass bottle cap, and the air inlet pipe and the air outlet pipe are arranged on the glass bottle cap. Insert it into the upper part of the glass bottle, and fix the fiber core at the other end. At the same time, the present invention also provides a calibrating method of the scattering cloud droplet particle detector, including the steps of determining the center position, calculating the area of ​​the sensitive area, drawing the amplitude frequency distribution map and the characteristic response curve of the cloud droplet particle detector. The invention avoids the problems of different speeds and coincidence in the sensitive area during the calibration process, ensures that the particles pass through the sensitive area, and improves the use efficiency of the particles.

Description

technical field [0001] The invention relates to a calibration device of a cloud drop particle detector, in particular to a calibration method and device of a scattering cloud drop particle detector using an optical fiber core to measure a sensitive area, and belongs to the technical field of meteorological analysis. Background technique [0002] The cloud droplet particle detector can be used to measure the particle size spectrum and water content of cloud droplet particles, and its measurement data has an important guiding role in artificial weather modification, which is conducive to improving the efficiency of artificial activities. During the measurement, the detector is fixed under the wing of the aircraft. When the aircraft flies in the cloud, the cloud droplet particles fly along the direction perpendicular to the optical path relative to the instrument. The particles scatter in the direction of 4π, and the receiving system receives the scattered light within the soli...

AI Technical Summary

Problems solved by technology

However, there are certain defects in this method, mainly as follows: 1. The speed of the blown particles is unstable, and the average speed of the particles is affected by the canned nitrogen cylinder. The speed of particles is different at each moment, resulting in different widths of electrical signals, which affects data processing; 2. Particle coincidence effect. When the nitrogen cylinder switch is just turned on, the general gas pressure is relatively high, and all standard particles are blown out in a short time. The density of the particles blown out is relatively high, causing multiple standard particles to appear in the optical path at the same time, that is, the receiving system receives the scattering of multiple particles at the same time, and a larger particle diameter will be obtained; 3. During the calibration process, the particles should be from the detector. The sensitive area passes through. There is no corresponding position adjustment structure in the current calibration, and the range of the sensitive area is very small, about 2mm. Therefore, it is difficult to ensure that the particles pass through the sensitive area, which also reduces the use efficiency of standard particles.

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