Laser forward-scattering cloud droplet spectrum probing system

Abstract

The invention provides a laser forward-scattering cloud droplet spectrum probing system. A laser used as an emission source and a laser focusing optical system are installed in the same arm of a probe; a photoelectric probe and a scattering light collecting optical system are installed in the other arm of the probe; a signal amplification circuit is arranged in a substrate between two arms of the probe; the focusing optical system forms a particle scattering region near a focus accessory; the scattering region is positioned at the center of the two arms; scattering signals are focused on a beam splitter prism through an imaging lens; the beam splitter prism guides the scattering signals to two photoelectric probes which are vertically installed according to proportion so as to perform comparison probing; the signal intensity of one photoelectric probe determines the size of the particles; and the signal intensity of the other probe determines the area of the scattering region, and the cloud droplet spectrum in the air, cloud droplet concentration and water content data can be calculated further. The system disclosed by the invention, based on the micro particles in the air to realize Mie scattering effect on laser, can determine the parameters of the cloud droplets by probing the scattering signals in a space sampling region.

Description

technical field [0001] The invention relates to a laser forward scattering cloud particle detection system used for measuring the distribution of water vapor droplet spectrum and water vapor content in the atmosphere. Background technique [0002] The laser forward scattering detection system used to measure aerosols in the atmosphere in the prior art uses tiny aerosol particles in the air to measure specific types of atmospheric aerosols on the Mie forward scattering signal of the laser and the principle of differential absorption . [0003] For example, the patent titled "System and Method for Measuring Harmful Particles" disclosed in US Patent No. US 2006 / 0232776 A1 is such a measuring device. It uses multiple lasers with different wavelengths as the emission source, one of which is used as the reference light, and the other beams are used as the detection light. If there is a specific type of harmful aerosol in the detection channel, the effective aerosol has a weak abs...

AI Technical Summary

Problems solved by technology

There are multiple optical lenses in the optical path that are fully reflective to lasers of a certain wavelength and fully transparent to lasers of other wavelengths. This optical lens has the defects of difficult processing, high manufacturing cost and high cost.

In addition, when it is detecting, due to the weak scattering signal, the scattering coefficient of each wavelength laser is inconsistent, and the intensity comparison of the scattering signal is easy to be misjudged, which affects the measurement accuracy and measurement accuracy.

Moreover, this patent can only measure the types of aerosol particles, but cannot obtain the diameter and distribution of aerosol particles

Images