Device for spray-field particle-size horizontal distribution measurement by dual-spectrum imaging

Abstract

The invention provides a device for spray-field particle-size horizontal distribution measurement by dual-spectrum imaging. The device excites a surface (called as an excitation surface) in a spray field by a laser sheet, and a liquid drop on the excitation surface contains a substance which can produce fluorescence by laser excitation. Mie diffusion light and fluorescent diffusion light produced by the laser sheet-excited liquid micro-drop group on the excitation surface are imaged respectively, and through comprehensive utilization of information of the two images, sault mean diameter (SMD) distribution data of the excitation surface is calculated. Compared with the PDA technology, the device has higher measurement efficiency and higher spatial resolution and can develop a PDA single-point measurement function into a two-dimensional plane measurement function. Compared with two cameras taking two different spectrum images, the device can utilize one camera, can take images of two different spectrums (such as an Mie diffusion light spectrum and a fluorescent diffusion light spectrum), has a simpler structure and a lower cost, and can carry out simple and reliable sequential control.

Description

technical field [0001] The invention relates to a measuring instrument for the particle size distribution of fog droplets, which can measure the particle size distribution of the atomization field in a statistical sense. Mainly used in the field of measuring instruments, it is an important measurement tool to obtain data for evaluating and improving spray or atomization functional structures. In particular, it relates to a device for measuring the plane distribution of fog field particle size by using dual-spectrum imaging. Background technique [0002] The measurement of atomized particle size is of great significance to the design optimization of nozzles and engine combustion chambers. The atomization particle size distribution directly affects the combustion efficiency of the engine, and is also an important indicator to determine the atomization characteristics of the nozzle. Because the atomization process is an extremely complex process with complexity and variabilit...

AI Technical Summary

Problems solved by technology

PDA is relatively mature and reliable for the particle size measurement technology of the atomization field, but there are defects: only single-point measurement, the concentration of the fog field should not be too high, and the measurement efficiency is low

However, the patent does not introduce the working principle of the particle size sensor, nor does it explain whether it overcomes the problem of low resolution along the laser beam direction caused by the line integration effect that is often encountered when the laser beam is used for particle size measurement.

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