Optimal Design Of The Laser Particle Size Analyzer

The particle size is an important parameter index in materials science, which response to the quality of industrial products intuitively. Therefore, the particle size analysis is an effective and reliable way to optimize products quality. There are a lot of particle size measurement methods, in which laser light scattering method are proverbially used for it's advantages as far-ranging measurement, widely materials application, high precision and so on. The way to improve detection accuracy and scope of laser particle size analyzer is expand the area of the photodetector. Use small area of new detector device as light target to improve measurement accuracy and the scope is the goal to optimize the laser particle size measurement program.In this situation, this article proposed the image sensor-based laser particle size optimize program, and completed the related theoretical analysis, simulation, program design, circuit design and experiment validation.First of all, introduce the concept of particle size distribution, study the working principle of laser particle measure system that based on light scattering theory. Establish the mathematical model of light scattering through the analysis of single particle and particles distribution of Mie scattering light intensity distribution combined with the particle size measurement system theory, and using Matlab to make simulation.Secondly, by analyzing the characteristics of the image sensor, combined with the requirement that laser particle test system remand photoelectric detectors, discuss the effect to the test system when use image sensor as light target. Proposed optimize program of laser particle size test system that based on image sensor. Discuss the main device parameters in the optical system of the laser particle test system, study of the influence to the optical system when using the image sensor device as a light target. Using C# language compile the aided design software of laser particle test system, and complete debugging.Thirdly, optimize the laser particle size control system. According to the requirements of design which core is embedded system and operating platform is PC. complete the chip selection, hardware circuit design, PCB board drawing. Completed software design based on embedded operating system AvrX and writed PC control software using C# in Visual Studio 2005 development platform.Finally, this paper completes the analysis of Mie scattering model simulation results. Accomplish the control of the test process in the particle size measurement through debug and verify the hardware circuit, the computer software, the PC software of laser particle analyzer control system.The particle size measurement project this topic proposed achieved image sensor used in laser particle size test, and provided a reference for further study of particle test techniques that based on image sensor. The control system designs achieve a computer-controlled technique of laser particle size analyzer, improve the automation of instrument. Lay the foundation for the intelligent, networklization and miniaturization of instruments.