Blurring image processing-based dynamic grain measuring device and method

Abstract

The invention discloses a blurring image processing-based dynamic grain measuring device and a method. The method is characterized by comprising the following steps of: lighting grains to be measured by adopting a light source or through a visual window, dividing light coming from a camera lens into two paths by a beam splitter prism, imaging by adopting two CCDs (Charge Coupled Device) or CMOS (complementary metal oxide semiconductor) image sensors with optical distance unequal to that of two corresponding emergent surfaces of the beam splitter prisms, judging whether the grains are positioned in front or behind a focusing plane according to different optical distances and different obtained grain image blurring extent, and calculating the positions of grains and the distance of the focusing plane according to defocusing amount of grains in one picture, thus determining a three-dimensional position of the grains; and further obtaining the three-dimensional movement speed information of the grains by combining motion blurring parameter of the grains, thus being capable of accurately determining the grain size of the grains. The invention has the benefits of being capable of realizing three-dimensional measurement on dynamic grains only by one camera lens, simplifying a measuring system and the data processing course and lowering the system cost.

Description

technical field [0001] The present invention relates to a dynamic particle measurement device and method, in particular to a device and method based on fuzzy image processing and using a camera lens to obtain particle size, three-dimensional position and movement speed information. Background technique [0002] In recent years, with the development of digital cameras and computer technology, particle image measuring instruments that use digital cameras to capture particles or particle phases in two-phase flow to obtain relevant information have been widely used. For the acquisition of dynamic particle three-dimensional position and velocity information, two or more sets of shooting systems are usually used to image from two or more perspectives. There are synchronization problems between two or more sets of shooting systems, the adjustment is very difficult, and the data processing is complicated; and in order to shoot clear particle transient images or interference images, ...

AI Technical Summary

Problems solved by technology

There is a synchronization problem between two or more sets of shooting systems, the adjustment is very difficult, and the data processing is complicated; and in order to shoot clear particle transient images or interference images, the exposure time is usually required to be extremely short, and high-speed cameras and High-energy pulsed laser light source, etc., the system cost is high

However, the existing single-camera movement or parameter adjustment distance measurement method needs to move the camera back and forth or adjust the camera parameters to take two different photos of the same object, which cannot accurately measure dynamic particles.

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