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

A planar distribution, dual-spectrum technology, applied in the direction of measuring devices, particle size analysis, particle and sedimentation analysis, etc., can solve the problems of low resolution, low measurement efficiency, no description, etc., achieve high time and space resolution, measure Effects of Efficiency Improvement and High Spatial Resolution

Inactive Publication Date: 2013-11-20
UNIV OF SCI & TECH OF CHINA
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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 no

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

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Example Embodiment

[0039] Nozzles are widely used in scientific research and various industrial production fields, and the distribution of droplet size in space has a great influence on its performance. At the same time, the spray process is an extremely complex process, and obtaining the spray particle size distribution data through experimental measurement is one of the main research methods at present. The invention can provide researchers with a device and a method for measuring the two-dimensional distribution of the fog field particle size. Its implementation method is as follows:

[0040] Build a spray test bench, fix the nozzle at a certain height, and spray downward. The liquid used for spraying in the experiment can be organic transparent liquids such as kerosene and gasoline, or other transparent liquids added with fluorescent agents. as attached figure 1 As shown, the wavelength and power of the laser output from the laser 1 are adjusted so that it can excite the micro-droplet gro...

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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...

Claims

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Application Information

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IPC IPC(8): G01N15/02
Inventor 刘维来张钟秀王克逸王声波
Owner UNIV OF SCI & TECH OF CHINA
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