Airborne Particle Counting Method and Device

Abstract

The present invention discloses an airborne particle counting method which makes the laser beam and the fluid flow passage vertically intersected to generate scattered light. The resulting scattered light is collected by two scattered light collecting plates to two spatial directions simultaneously. The resulting electrical signals generated by these two plates are respectively amplified by different subsequent signal amplification circuits, with different amplification factors. Statistical analysis is performed on each amplified electrical signal and amplitude distribution to measure the peak topography of electrical signals of different intensity. The numbers of particles of different sizes are obtained through calculation. The present invention has simple structure and low cost, and can provide more comprehensive signal collection of the scattered light, being beneficial to realize the comprehensive statistics of airborne particles of different sizes, to improve the accuracy of the statistics of airborne particles of various sizes, and to eliminate the influence of airborne particle form and shape on counting. The present invention also provides an airborne particle counting device.

Dependencies are inferred from the claim text.