Particle trajectory speed measurement device and method combining compound blur and binocular imaging

Abstract

The invention relates to a particle trajectory speed measurement device and method combining compound blur and binocular imaging. A light source illuminates a to-be-measured flow field, double lenses and double cameras are fixedly connected with each other in a one-to-one correspondence manner; the constructed two sets of lenses and cameras are arranged at a fixed angle, and the two sets of lenses can observe the to-be-measured flow field at the same time; a signal generator provides a stroboscopic signal for the light source, single-frame multi-exposure combining long exposure and short exposure is achieved; and the signal generator provides a synchronous trigger signal for the double cameras and the light source; the double cameras shoot flow field images and send the flow field images to a computer; and the computer obtains single-frame multi-exposure images of a binocular vision system under two different visual angles, and calculates the three-dimensional flowing speed and acceleration of particles of the to-be-measured flow field. With a three-dimensional flow field motion information acquisition technology combining particle trajectory speed measurement, compound blur and binocular imaging adopted, a microscopic flow field and a high-speed flow field are tested; a measurement system is simplified, a data processing process is optimized; and three-dimensional flow field measurement of the microscopic flow field or the high-speed flow field can be realized.

Description

technical field [0001] The invention relates to a three-dimensional flow field measurement technology, in particular to a particle track speed measurement device and a speed measurement method combined with mixed blur and binocular imaging. Background technique [0002] Flow is a ubiquitous phenomenon in nature, and obtaining accurate and quantitative experimental data of flow field is the premise of its research. Quantitative acquisition of three-dimensional velocity field is the focus and difficulty of current flow field measurement research. One of the common three-dimensional flow field measurement methods is to use a binocular vision system to photograph the fluid flow area where tracer particles are scattered from two different angles of view. Microscopic imaging system), there is defocus blur in the tracer particle imaging, and there is motion blur in the particle imaging when the moving speed is fast. If a corresponding treatment method can be proposed for the coex...

AI Technical Summary

Problems solved by technology

One of the common three-dimensional flow field measurement methods is to use a binocular vision system to photograph the fluid flow area where tracer particles are scattered from two different angles of view. microscopic imaging system), there is defocus blur in the tracer particle imaging, and there is motion blur in the particle imaging when the moving speed is fast

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