Particle measurement method and device based on optical fiber type dynamic light scattering mutual correlation technology

Abstract

The invention discloses a particle measurement method and device based on an optical fiber type dynamic light scattering mutual correlation technology. A laser device and a first optical fiber probe in a sample pool form an incidence optical path; a second optical fiber probe in the sample pool and the first optical fiber probe form a scattering optical path; scattered light passes through a coupler, a first optical detector and a second optical detector to form a dynamic scattered light signal detection and processing unit through a digital correlator and a micro mechanism; laser irradiates the particle sample pool through the first optical fiber probe; particles scatter the laser; the scattered light is received by the second optical fiber probe, then is divided by the coupler, enters the two optical detectors and is converted into a pulse signal read by the micro mechanism to calculate a particle size. The conventional optical elements are eliminated, so that the size of a system is greatly reduced; more importantly, the optical fiber probes can be directly inserted into a sample solution and can directly measure a sample with high concentration; and therefore, on-line monitoring and remote measurement for industrial production are realized.

Description

technical field [0001] The invention relates to a measuring method and device characterized by adopting an optical method, in particular to a particle measuring method and device based on fiber optic dynamic light scattering cross-correlation technology. Background technique [0002] Particles are tiny solids, liquids or gases in a divided state. In most cases, the term particle is used broadly to refer to solid particles, while liquid particles and gas particles are referred to as droplets and bubbles, respectively. [0003] In modern industrial production, national defense construction and high-tech fields, granular materials are widely used in medicine, chemical industry, metallurgy, electronics, machinery, light industry, food, construction and environmental protection and other industries. Many important characteristics of granular materials are determined by the average particle size and particle size distribution parameters of the particles. With the development of s...

AI Technical Summary

Problems solved by technology

Particle measurement methods include screening methods, microscopy methods, sedimentation methods, electrical induction methods, and light scattering methods. These methods have their own characteristics, but are limited by their working principles. In addition, other methods are generally not suitable for the measurement of particles below the micron. Microscopic methods and photon correlation spectroscopy can be used for the measurement of particles below the micron, but they are not suitable for online applications.

Images